AVR-Chat

With the AVR it is pretty easy (well, probably difficult the first time...).

http://www.barello.net/Papers/AVR%20RC%20output.pdf

Shows how to generate 8 R/C pulse outputs with a couple lines of code and a
shift register.  You could hack it to just output one pulse (i.e. drop the
shift register...) then write a few more lines of code to take whatever
input you want (analog signal) and pump out the appropriate R/C pulse to
your favorite off the shelf three phase BLDC motor controller/motor combo.

Cheers!

P.S. If all you want is a small high speed motor with speed control, check
out the cheap desktop mill's from places like Grizzley.com - perhaps you can
get a motor/controller as spare parts?  Or check out Grainger.com  This kind
of stuff is very common.

-----Original Message-----
From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf
Of Dave Mucha
Sent: Monday, September 05, 2005 10:57 AM
To: AVR-Chat@yahoogroups.com
Subject: [AVR-Chat] Re: R/C throttle control ? what is best ?

Thanks all,

I guess I have been more focused on how to get the signal to a
purchhased R/C controller than the best way to control a motor.

I would like to use a brushless motor.  There seem to be pretty large
burshless motors, and they can spin 25,000 PRM or better.

So, if I restated my goal as a motor that can turn 15,000 or more, and
have a controller to regulate speed, what would anyone recomend ?

I am leery of a brushed motor as of the higher maintenacne of them.

Dave








 
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